Giant Stalagmite and Big passage with Gareth ‘Sweeney’ Sewell in the background on the Hand of Dog. A British caving team discovered the world’s biggest cave passage in Vietnam, sometimes up to 200 meters high.

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Carsten Peter is a regular contributor to National Geographic magazine, and specializes in going to extremes: scuba diving in a glacier on Mont Blanc, crossing the Sahara on a camel, caving in Borneo. He lives on the edge with his camera, searching for where nature is still pure, and where his survival will depend on his wits and his skills as a technical climber, paraglider, caver, diver, and canyoneer.